BUG: working on a fix for #487.
DOC: clarifying remap_ids
ENH new .travis.yml
ENH travis.txt
comparing higher_order_sp as a replacement for implementation of higher_order
ENH new kw args for higher_order_sp.
Merge branch 'master' of github.com:pysal/pysal into 487

Conflicts:
	.travis.yml
Phil: Skipping several tests that fail due to precision under older scipy.
BUG cleaning up temporary files for #398
Merge pull request #493 from pedrovma/spreg18

Phil: Skipping several tests that fail due to precision under older scipy
Merge pull request #492 from sjsrey/b398

BUG cleaning up temporary files for #398
Update .travis.yml
Merge pull request #490 from sjsrey/487

Fix for #487